#define CC_NO_UPDATER
#define CC_NO_DYNLIB
#define CC_NO_SOCKETS
#define CC_NO_THREADING

#include "../Stream.h"
#include "../ExtMath.h"
#include "../SystemFonts.h"
#include "../Funcs.h"
#include "../Window.h"
#include "../Utils.h"
#include "../Errors.h"
#include "../PackedCol.h"

#include <errno.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <utime.h>
#include <stdio.h>
#include <io.h>

const cc_result ReturnCode_FileShareViolation = 1000000000; /* TODO: not used apparently */
const cc_result ReturnCode_FileNotFound     = ENOENT;
const cc_result ReturnCode_DirectoryExists  = EEXIST;
const cc_result ReturnCode_SocketInProgess  = -10002;
const cc_result ReturnCode_SocketWouldBlock = -10002;
const cc_result ReturnCode_SocketDropped    = -10002;

const char* Platform_AppNameSuffix = " DOS";
cc_uint8 Platform_Flags = PLAT_FLAG_SINGLE_PROCESS | PLAT_FLAG_APP_EXIT;
cc_bool  Platform_ReadonlyFilesystem;
#include "../_PlatformBase.h"

/*########################################################################################################################*
*-----------------------------------------------------Main entrypoint-----------------------------------------------------*
*#########################################################################################################################*/
#include "../main_impl.h"

int main(int argc, char** argv) {
	cc_result res;
	SetupProgram(argc, argv);

	do {
		res = RunProgram(argc, argv);
	} while (Window_Main.Exists);

	Window_Free();
	Process_Exit(res);
	return res;
}


/*########################################################################################################################*
*------------------------------------------------------Logging/Time-------------------------------------------------------*
*#########################################################################################################################*/
void Platform_Log(const char* msg, int len) {
	int ret;
	/* Avoid "ignoring return value of 'write' declared with attribute 'warn_unused_result'" warning */
	ret = write(STDOUT_FILENO, msg,  len);
	ret = write(STDOUT_FILENO, "\n",   1);
}

TimeMS DateTime_CurrentUTC(void) {
	struct timeval cur;
	gettimeofday(&cur, NULL);
	return (cc_uint64)cur.tv_sec + UNIX_EPOCH_SECONDS;
}

void DateTime_CurrentLocal(struct cc_datetime* t) {
	struct timeval cur;
	struct tm loc_time;
	gettimeofday(&cur, NULL);
	localtime_r(&cur.tv_sec, &loc_time);

	t->year   = loc_time.tm_year + 1900;
	t->month  = loc_time.tm_mon  + 1;
	t->day    = loc_time.tm_mday;
	t->hour   = loc_time.tm_hour;
	t->minute = loc_time.tm_min;
	t->second = loc_time.tm_sec;
}


/*########################################################################################################################*
*-------------------------------------------------------Crash handling----------------------------------------------------*
*#########################################################################################################################*/
void CrashHandler_Install(void) { }

void Process_Abort2(cc_result result, const char* raw_msg) {
	Logger_DoAbort(result, raw_msg, NULL);
}


/*########################################################################################################################*
*--------------------------------------------------------Stopwatch--------------------------------------------------------*
*#########################################################################################################################*/
#define US_PER_SEC 1000000ULL

cc_uint64 Stopwatch_Measure(void) {
	struct timeval cur;
 	gettimeofday(&cur, NULL);
	return (cc_uint64)cur.tv_sec * US_PER_SEC + cur.tv_usec;
}

cc_uint64 Stopwatch_ElapsedMicroseconds(cc_uint64 beg, cc_uint64 end) {
	if (end < beg) return 0;
	return end - beg;
}


/*########################################################################################################################*
*-----------------------------------------------------Directory/File------------------------------------------------------*
*#########################################################################################################################*/
void Platform_EncodePath(cc_filepath* dst, const cc_string* path) {
	char* str = dst->buffer;
	String_EncodeUtf8(str, path);
}

void Platform_DecodePath(cc_string* dst, const cc_filepath* path) {
	const char* str = path->buffer;
	String_AppendUtf8(dst, str, String_Length(str));
}

void Directory_GetCachePath(cc_string* path) { }

cc_result Directory_Create(const cc_filepath* path) {
	/* read/write/search permissions for owner and group, and with read/search permissions for others. */
	/* TODO: Is the default mode in all cases */
	return mkdir(path->buffer, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) == -1 ? errno : 0;
}

int File_Exists(const cc_filepath* path) {
	struct stat sb;
	return stat(path->buffer, &sb) == 0 && S_ISREG(sb.st_mode);
}

cc_result Directory_Enum(const cc_string* dirPath, void* obj, Directory_EnumCallback callback) {
	cc_string path; char pathBuffer[FILENAME_SIZE];
	cc_filepath str;
	DIR* dirPtr;
	struct dirent* entry;
	char* src;
	int len, res, is_dir;

	Platform_EncodePath(&str, dirPath);
	dirPtr = opendir(str.buffer);
	if (!dirPtr) return errno;

	/* POSIX docs: "When the end of the directory is encountered, a null pointer is returned and errno is not changed." */
	/* errno is sometimes leftover from previous calls, so always reset it before readdir gets called */
	errno = 0;
	String_InitArray(path, pathBuffer);

	while ((entry = readdir(dirPtr))) {
		path.length = 0;
		String_Format1(&path, "%s/", dirPath);

		/* ignore . and .. entry */
		src = entry->d_name;
		if (src[0] == '.' && src[1] == '\0') continue;
		if (src[0] == '.' && src[1] == '.' && src[2] == '\0') continue;

		len = String_Length(src);
		String_AppendUtf8(&path, src, len);

#if defined CC_BUILD_HAIKU || defined CC_BUILD_SOLARIS || defined CC_BUILD_IRIX || defined CC_BUILD_BEOS
		{
			char full_path[NATIVE_STR_LEN];
			struct stat sb;
			String_EncodeUtf8(full_path, &path);
			is_dir = stat(full_path, &sb) == 0 && S_ISDIR(sb.st_mode);
		}
#else
		is_dir = entry->d_type == DT_DIR;
		/* TODO: fallback to stat when this fails */
#endif

		callback(&path, obj, is_dir);
		errno = 0;
	}

	res = errno; /* return code from readdir */
	closedir(dirPtr);
	return res;
}

static cc_result File_Do(cc_file* file, const char* path, int mode) {
	*file = open(path, mode, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
	return *file == -1 ? errno : 0;
}

cc_result File_Open(cc_file* file, const cc_filepath* path) {
	return File_Do(file, path->buffer, O_RDONLY | O_BINARY);
}
cc_result File_Create(cc_file* file, const cc_filepath* path) {
	return File_Do(file, path->buffer, O_RDWR | O_CREAT | O_TRUNC | O_BINARY);
}
cc_result File_OpenOrCreate(cc_file* file, const cc_filepath* path) {
	return File_Do(file, path->buffer, O_RDWR | O_CREAT | O_BINARY);
}

cc_result File_Read(cc_file file, void* data, cc_uint32 count, cc_uint32* bytesRead) {
	*bytesRead = read(file, data, count);
	return *bytesRead == -1 ? errno : 0;
}

cc_result File_Write(cc_file file, const void* data, cc_uint32 count, cc_uint32* bytesWrote) {
	*bytesWrote = write(file, data, count);
	return *bytesWrote == -1 ? errno : 0;
}

cc_result File_Close(cc_file file) {
	return close(file) == -1 ? errno : 0;
}

cc_result File_Seek(cc_file file, int offset, int seekType) {
	static cc_uint8 modes[3] = { SEEK_SET, SEEK_CUR, SEEK_END };
	return lseek(file, offset, modes[seekType]) == -1 ? errno : 0;
}

cc_result File_Position(cc_file file, cc_uint32* pos) {
	*pos = lseek(file, 0, SEEK_CUR);
	return *pos == -1 ? errno : 0;
}

cc_result File_Length(cc_file file, cc_uint32* len) {
	long raw_len = filelength(file);
	if (raw_len == -1) { *len = -1; return errno; }
	*len = raw_len; return 0;
}


/*########################################################################################################################*
*--------------------------------------------------------Threading--------------------------------------------------------*
*#########################################################################################################################*/
void Thread_Sleep(cc_uint32 milliseconds) { usleep(milliseconds * 1000); }


/*########################################################################################################################*
*-----------------------------------------------------Process/Module------------------------------------------------------*
*#########################################################################################################################*/
cc_bool Process_OpenSupported = false;

cc_result Process_StartGame2(const cc_string* args, int numArgs) {
	return SetGameArgs(args, numArgs);
}

void Process_Exit(cc_result code) { exit(code); }

cc_result Process_StartOpen(const cc_string* args) {
	return ERR_NOT_SUPPORTED;
}


/*########################################################################################################################*
*--------------------------------------------------------Platform---------------------------------------------------------*
*#########################################################################################################################*/
void Platform_Free(void) { }

cc_bool Platform_DescribeError(cc_result res, cc_string* dst) {
	char chars[NATIVE_STR_LEN];
	int len;

	/* For unrecognised error codes, strerror_r might return messages */
	/*  such as 'No error information', which is not very useful */
	/* (could check errno here but quicker just to skip entirely) */
	if (res >= 1000) return false;

	len = strerror_r(res, chars, NATIVE_STR_LEN);
	if (len == -1) return false;

	len = String_CalcLen(chars, NATIVE_STR_LEN);
	String_AppendUtf8(dst, chars, len);
	return true;
}

void Platform_Init(void) {
}


/*########################################################################################################################*
*-------------------------------------------------------Encryption--------------------------------------------------------*
*#########################################################################################################################*/
cc_result Platform_Encrypt(const void* data, int len, cc_string* dst) {
	return ERR_NOT_SUPPORTED;
}

cc_result Platform_Decrypt(const void* data, int len, cc_string* dst) {
	return ERR_NOT_SUPPORTED;
}

cc_result Platform_GetEntropy(void* data, int len) {
	return ERR_NOT_SUPPORTED;
}


/*########################################################################################################################*
*-----------------------------------------------------Configuration-------------------------------------------------------*
*#########################################################################################################################*/
int Platform_GetCommandLineArgs(int argc, STRING_REF char** argv, cc_string* args) {
	int i, count;
	argc--; argv++; /* skip executable path argument */
	if (gameHasArgs) return GetGameArgs(args);

	count = min(argc, GAME_MAX_CMDARGS);
	for (i = 0; i < count; i++) 
	{
		args[i] = String_FromReadonly(argv[i]);
	}
	return count;
}

cc_result Platform_SetDefaultCurrentDirectory(int argc, char **argv) {
	return 0;
}

